The Nuby No-spill Printed Cup with Silicone Spout is free of BPA and other harmful toxins and is perfect for beginners. The soft spout makes it easier for your baby to transition from bottle to cup. It is made from plastic #5 (polypropylene) and has a soft silicone spout, which is designed to help prevent drips and spills and protect your baby's delicate gums and emerging teeth. The built in vari-flo valve eliminates extra pieces to wash and allows your child to control the rate of liquid flow. This cup is safe for warming fluids in the microwave.